Lemon is alkaline. Lemon is obviously sour, and its pH value is acidic. It is also an alkaline food. This is because although there is citric acid in lemon, it can be completely metabolized into carbon dioxide and water in the body. With the exhalation of carbon dioxide, the acidity disappeared. But the potassium and calcium ions in lemon remain in the body in the form of metal cations. These ions can combine with acid radical ions to reduce the acidity of urine, so it is called "alkaline food". Not only lemons, but also most fruits are alkaline foods. This is especially important for patients with gout and hyperuricemia, because when urine is alkaline, uric acid will form salt, which is easily eliminated by the body and can reduce the risk of gout attack.

Lemon is flat, so it is neither too hot nor too cold to soak in water.

Its effects are: promoting fluid production to quench thirst, relieving summer heat and preventing miscarriage, stimulating appetite and promoting digestion. But people with poor spleen and stomach, it is best to drink less. Because lemon is very irritating, it will stimulate the stomach to produce more gastric acid, but stimulate the spleen and stomach. Therefore, it is ok to drink a little once in a while.

Lemon itself is a kind of fruit with high nutritional and medicinal value. It is rich in citric acid and is known as the "citric acid warehouse". Besides sugar, the main nutrients in lemon are calcium, phosphorus and iron, vitamin B 1, vitamin B2, vitamin C and nicotinic acid.